#include <iostream>
#include <cmath>
#include <iomanip>
#include <windows.h>

using namespace std; // FIXME: add blank line after include

int main()
{
    SetConsoleTitle("doubleNum");
    cout << fixed; //强制以小数的方式显示
    cout << setprecision(3); //控制显示精度
    double doubleNum = 100.0/3.0;
    cout << doubleNum << endl;
    return 0;
}
